Gas cut-off.



' UNITED STATES PATENT OFFICE JOHN W. FIELDS, OF BRIDGEPORT, CONNECTICUT, ASSIGXOR OFONE-EIGHTH TO JOHN N. STANDISH AND ONE-EIGHTH TO HARRY PEARSALI OF BRIDGEPORT, CONNECTICUT, AND ONE-FOURTI TO FRANK R. WHITE, OF WATERBURY, CONNECTICUT.

GAS CUT-OFF.

Offs, of which the 0 lowing is a specification.

My invention relates to automatic gas cutoffs, and is especially adapted for use in connection with coin operated meters, which 'vdll provide a positive-cut-ofifor the gas should r out wit "suite the supply be cut oil and then renewed while the'gas cocks of burners or stoves are open. It is obvious that many-fatal accidents have beencaused by the use of coin operated meters, Tliesew-aecidents-have usual y been all the as cocks when the supply of gas gave theresultthat afterwards when the gas'supply was renewed the gas escaped from the 0 en cocks andserious consequences red Thepresent invention renders accidents of this kind impossible since it provides an automatic cut off for'burners and gas pipes generally, so that should the supply of gas be cut off and then again renewe with the cocks open no harm could result.

With the above and other minor objects in view I have-devised the novel and practical automatic gas cut off shown upon the accompanying drawings forming a part of this specification upon which similar numerals of reference are used to indicate corresponding parts throughout the several figures, and of which,

Figure 1 shows a side elevation of my invention as adapted for use in connection with an illuminating gas burner, attached to a gas pipe. Fig. 2', 1s a central vertical longitudinal section through the burner shown in Fig. 1, the valve being in a lowered or closed position.- Fig; 3, is a similar longitudinal vertical sectionlwith theoperative parts in a different position as operated preparatory to li hting the burner.- Fig. 4, is a detached plan view of the operative upper portion or tube of the cutoff. 5,.is a detail plan or end view of the movable valve mounted within the cut-off, and Fig. 6; is a longitudinal sectional view of a modified form ofcutoff designed for use in connection with gas supply for a gas stove.

Referring in detail to the form of my device to be used in connection with a gas Specification of Letters Patent.

26. 1907- Serial No. 894.667-

Patented Jan." 21, 1908.

burner and as shown in Figs. 1 to 5 inclusive 10 indicates a base which is chambered, an

threaded'asat 1 1 for attachment to a gas pipe 34 as shdwn in Fig.- 1. 'A'central passa e 12 extends up- 'through the base from the c amber to conduct the gas into the upper or burner chamber. Surrounding the upper or out-let end of this passage is formed an annular tapered enlargement 13'that serves as a valve sedt'ginto which the cone-shaped'plug 14 on valve 15 rests when the burner is not in operation, The said base is providedjwith an annular ledge 16 uponwhich is seated a shell 17 that may be secured thereto in any suitable way as for instance by having ockets 18 fornied upon the inner side of the owcr portion of the shell to spring over and receive the enlar ement 19 of the base.

Within the s iell 17 is slidabl tube 20, the upper portion 0 which rotrudes through an opening 21 in the en of the shell while'the extreme end 22 is fitted with a burner tip 23., Within this tube is formed an internal annular ledge 24 to en gage and support the valve 15. The lower portion of this tube is provided with an outwardly extended flange 25 that operatively engages the inner surfaceof the before men-. tioned shell 17. A spring 26 is mounted intermediate of the upper end of the before mentioned shell 17 and the flange of said tube 20 8,114. serves to hold the tube down tightly against the. annular ack 27 mounted upon the shoulder of t evbase surrounding the seat 13, to form a gas tight connection that will'not permit a leakag ofgas therepast. is formed integral with the flange 25 of the tube 20 is disposed outward through a slot 29 in the shell 17 to permit of the operation of the tube as in raising and lowering the same preparatory to lightinq'the burner. Within the tube 20 is mounted the valve 15 which is comparatively lightrand of a eneral cylindrical form, but having a suitable number of vertical grooves 30 and [cross grooves 3 1.to permit of a flow of gas past the valve and through the. tube when'the former is so positioned within the shell as to allow'of the passage of gas from the, chamber in base.

The depending plug 14 is of a size and shape to snugly enter the seat 13 and close the passage 12 from the chamber of the base when the said valve 15 is seated as in Fig. 2,

mounted a An extended finger piece. 28 that Y gas to escape into the outer shell. The outer 'p nection may be made and is located and in a way to hold back the gas until such 7 timesas the said valve may be manuallyelevated to open the said passage. After being raised in this way to elevate the valve the ,tube may be immediately released when the spring 26 will force the same down, while the pressure of gas exposed to the underside of' valve retains the same in an elevated position in-a manner to allow the gas to pass thereby.

- In Fig. 6, I have shown a cut-off adapted to be used 1n connection with a'gas stove or "range, which is very similar to the previously described-construction, except that it has. no

burner tip; the to end of the tube 20 being closed and provi. ed with a flange 32 which extends slightly beyond the shell '17 and forms a'means for engagement to open 'the valve. An opening .36. is formed in oneside of the lower portion of this tube to allow the shell 17-asshown in this form contains a side outlet 33 withwhich a stove or ran e'conj acent to the said opening 36.

From the foregoing it will be noted that the normal position of the valve in. the cutoff is obviously closed as "shownin; Fig. 2,

a valve seat'm sai .wit drawing when not-in use and at such times as when the gas is cut-off either at the meter, or in the cock 35 in as ipe 34 and that when it is de-. Y sired to li'g t t e burner the gas would neces- -I claim and desire to secure by Letters Patent is:-

1. An automatic gas out oif comprising a base having a gas (passage therethrough and 'passa e, a shell attached to the base, a tube slidab y mounted within the shell, a valve movably mounted within' the tube bearing a cone to enga e and close the valve-seat and port when t e device is closed and means for operating the tube to raisethe valve from it's'seat.

:2. automatic gas cut-off comprising a base having a gas assage leading,therethrough a tube slida 'ly connected with the base, as valve mountedwithin the tube adaptedto c ose thegas passage when in' a lowered'position, ashell to inclose said tube aaden'gage the base, and a spring intermediatetheshell and tube to normally hold the latter and its valve closed."

3. An automatic gas cut-off comprising a base having a gas passage therethrough, a

tube slidably mounted upon the base having an extension to form a finger iece and an internal annular shoulder, a va ve mounted wit-hin'the tube ada ted to be engaged by the said shoulder an bear'm a cone shaped plug to engage and close t e gas I, when the gas pressure is cut off, a she l toinclose the tube and a spring intermediate the shell and tube'to normally hold the 'same in aloweredorclosed position. V

4. In an automatic gzs cut-ofi of the class described the combination with a base hav assage big a port therethrough, of a tube slidably mounted upon said base, a Y slidin valve within the tube adapted -to' be norma ly held raised by gas pressure but-to drop and close the gas passage to form a seal when the gas supply is cut off and grooves insaid valve to ernut of the passage of gas therepast when 111 said raised position.

5. The combinationwith a gas inlet, of a I sliding valve to engage and close said inlet and having grooves in its sides to permit of a flow of ga's'therepast, a tube to inclose and cover the said gas inlet and having an extension to form afinger piece to operate the valve, and means within the tube to engage the valve to raise and open the same.

6. In an automatic gas cut-off the combination with a base having a gas passage theret-hrough, of' a shell connected with the base, a tube mounted within the shell and slidably connected with the basev and having an extended finger piece whereby. the tube is '0 erated and an internal annular led e, a s lding valve mounted within the tu e adapted to be engaged by the said ledge and providedwith a cone shaped plug to engage and closethe gas passage, andan opening from said tube to permit the gas to flow therefrom. '1

- 7. An automatic gas cut-ofi' comprising a base having'a gas passa e therethrough and a conicalvalve seat, a tube slidably mounted upon the base, a valve mounted within the tube bearing a-coneshaped end and.having grooves in its seat to form gas'passageaan opening in the side of the tube to permit of an escapeof gas, a-shell inclosing the tube, and also having a gas outlet: ad oining the opening in the'tube, and aspring interme-- diateo the shell and tube.

Si ed atv Bridgeport, in the county of Fairheld, and State of Connecticut, this 21st day of September, A. D., 1907.

. JOHN W.- FIELDS.

Witnesses:

O. M. NEwMAN, H. G. GREENE. 

